Exhaust apparatus



March 26, 1940. DOYLE 2,194,928

EXHAUST APPARATUS Fi led Feb. 25, 1957 5 Sheets-Sheet 1 INVENTOR W. L. H. DOYLE W. L. H. DOYLE EXHAUST APPARATUS Filed Feb. 25, 1957 Ma -ch 26, 1940.

3 Sheets-Sheet 2 INVENTOR W. L. H. DOYLE ATTORN March 1940- w. H. DOYLE EXHAUST APPARATUS Filed Feb. 257 1937 5 Sheets-Sheet 5 'INVENTOR W. L. H. DOYLE A TORNEY Patented Mar. 26, 1940 2,194,928

UNITED STATES PATENT OFFICE EXHAUST APPARATUS William L. H. Doyle, Swarthmore, Pa, assignor,

by mesne assignments, to The Baldwin Locomotive Works, a corporation of Pennsylvania Application February 25, 1937, Serial No. 127,797

6 Claims. (01. 123-52) This invention relates generally to exhaust Fig. 6 is a vertical section taken substantially apparatus for internal combustion engines and on the line 6-6 of Fig. 5. more particularly to an improved combined In the particular embodiments of the invenheader and muiiler that is especially applicable tion such as are disclosed herein merely for the to locomotive Diesel engines. purpose of illustrating certain. specific forms 6.

While a. great many types of exhaust mufllers among possible others that the invention might have heretofore been proposed and used, yet they take in practice, I have shown in Fig. 1 a con have been deficient in many respects, especially ventional type of internal combustion engine 4 when employed with Diesel engines in locomotive preferably of the locomotive Diesel type having service. cylinder heads 5 and 6 which may be provided 10 .It is one object of my invention to provide an with any conventional form of exhaust passages improved exhaust mufller that is of minimum therein. weight and size for a given gas capacity, is adapt- My improved header-mufiler generally indied to be readily cleaned and forms a rugged unit cated at I is provided with a centrally located with the engine. Another object is to provide pipe 8 extending downwardly and inwardly as an improved combined header and muflier that shown in Fig. 4 for connection to the sideof the is relatively simple and economical in construccylinder head to establish communication with tion, operation and maintenance. A further obthe cylinder head exhaust passage. A- relatively ject is to provide an improved header-muffler heavy sheet metal wall 9, preferably cylindrical, system adapted to facilitate removal of certain is welded or otherwise suitably secured to pipe 8 20 cylinder heads independently of other heads and for communication therewith through an openof the exhaust apparatus connected thereto. ing H). Projecting downwardly through the top In the specific aspect of the invention I acof the internal wall 9 is a pair of vertical discomplish certain of the foregoing desirable feacharge pipes H and I2, these also being welded 5 tures by providing a single structure adapted to or otherwise suitably secured to the wall 9. The

function as a combined header and mufiier so inner ends-of discharge pipes II and I2 dependarranged that removable end plates may be used ently support an internal preferably cylindrical to permit access to the interior of the apparatus sheet metal wall [3 welded or otherwise suitably for cleaning or inspection and also arranged so secured to the discharge pipes. The: internal as to eliminate the necessity for using water to wall I3 is preferably concentrically arranged 30 cool the customary relatively heavy exhaust with respect to wall 9 to form an outer annular manifolds or headers of the prior art. By elimipassage l4 therebetween while wall 13 forms an nating the necessity of using cooling water, it has inner passage.

been possible to reduce appreciably thecapacity To close the ends of the outer wall 9 in a of the cooling water radiator used with the ensimple and efiective manner while at .the same 35 gine. time insuring maximum accessibility to the in- Other objects and advantages will be more side of the header-muffler together with comapparent to those skilled in the art from the pleting an internal tortuous muffler passagefollowing description of the accompanying drawway, I provide a preferably circular end plate 40 ings in which: I5 having an inwardly projecting preferably 40 Fig. 1 is a side elevation of an internal comcylindrical wall l6 arranged in overlapping rebustion engine embodying my invention; lation to the end of internal passage l3 thereby Fig. 2 is an end elevation of Fig. I viewed from to provide an intermediate annular passageway the left end thereof; H. To rigidly reinforce the ends of outer wall 5 Fig. 3 is a side elevation of the header-mufiler 9 to provide a firm" support for bolts IS, a relremoved from the engine and viewed in the atively heavy annular ring 191s welded or otherdirection of the arrow 3 in Fig. 2, parts of the wise suitably secured to wall 9. The bolts I8 thus unit being broken away to show details of interfirmly hold the end plates I5 in position.

nal construction; It will be understood that the unit above de- 9 Fig. 4 is a vertical transverse section taken on scribed is symmetrical about its vertical center the line 4-4 of Fig. 3; and hence the description of one end of the unit Fig. 5 is a modification employing the prin will suffice for both ends. It will also be underciples of construction of my invention but havstood that wall 9 is covered with any suitable ing a multiplicity of exhaust connections; heat insulating material 20 which in turn is 6 covered by a sheet metal enclosure 2! welded or otherwise suitably secured to wall 9.

In operation of the Fig. 3 form, exhaust gases are discharged into pipe 8 of each of the plurality of units 1 and thence flow through the passageways l4 and Il and pipe [3 to be discharged upwardly to the atmosphere through pipes H and I2. Due to the relatively simple and compact construction, it is seen that a plurality of these relatively small units may be attached to the cylinder heads or groups thereof. Also due to this improved construction, the units are adapted to function both as a header and muffler instead of employing a usual heavy exhaust manifold or header on the engine and a separate mufiier.

In Figs. 5 and 6, the same general construction and arrangement of cylindrical sheet metal walls and end plates is used as shown in Fig. 3, and hence the same reference numerals are applied to the same parts. However, due to the relatively great length of wall l6, spacers 23 are interposed between the internal wall l3 and said wall l6. Also instead of a single exhaust pipe connection such as 8, a series of lateral connections 24 are provided one at the center and one at each end. These connections and also pipe 8, are made preferably of cast metal to which the outer sheet metal pipe 8 is connected. As shown in Figs. 5 and 6, the connections 24 also function to connect the cooling water jacket of the engine with a water header 25 as through a suitable opening 26, chamber 2'! formed in the upper part of the connection 24 and thence to the vertical pipes 28. The mode of operation and advantages of this arrangement are the same as for the preferred form, and hence further discussion is not deemed. necessary.

It will be seen in general that the principle of construction of my improved unit permits a compact and relatively inexpensive headermufiier to be constructed requiring minimum space, especially in a Diesel type locomotive, wherein very little excess space is available. Notwithstanding the cramped quarters in which an engine may be located, it is seen that my unit is conveniently accessible for cleaning and inspection by mere removal of the end plates and also in the Fig. 3 form any one of the individual units may be removed independently of the others to permit removal or inspection of a cylinder head.

It will of course be understood that various changes in details of construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as set forth in the appended claims.

I claim:

1. A combined exhaust manifold and inuiiler for internal combustion engines comprising, in combination, longitudinally extending inner and outer walls radially spaced to form inner and outer passageways, the inner passageway being of shorter length than the outer passageway and the inner passageway having its most axially remote portions provided with open ends, a laterally extending engine connection communieating with the outer passageway, a laterally extending exhaust discharge passage communicating with the inner passageway and extending transversely through said outer wall to discharge to the atmosphere, and end plates closing the ends of said outer passage and axially spaced from the remote open ends of said inner passage.

2. The combination set forth in claim 1 further characterized in that said end closure plate has a passage wall projecting inwardly so as to be interposed between and spaced from said inner and outer walls, one end of said passage wall being closed by said closure plate and the other end freely terminating so as to be entirely open.

The combination set forth in claim 1 further characterized in that said inner and outer walls are cylindrical in cross-section and are arranged substantially concentrically to each other to form an open ended passageway.

i. The combination set forth in claim 1 iurther characterized in that said end closure plate has a passage wall projecting inwardly so as to be interposed between and radially spaced from said inner and outer walls, said inner and outer walls and said inwardly projecting passage well being substantially cylindrical in formation and being arr -ged substantially concentric relative to each other, a second laterally extending exhaust discharge pipe communicating with the inner passageway and extending transversely through said outer wall to discharge to the atmosphere, said exhaust discharge passages from the inner passage being respectively located adjacent the inner ends of said inwardly projecting passage walls.

5. A combined header and muffler comprising, in combination, longitudinally extending inner and outer walls forming inner and outer passagew an end closure plate for said outer passageways, a cast inlet connection having communication w th said outer passage and secured to said outer wall to support the same, a discharge pipe connected to said inner passageway and extending through said outer wall to discharge to the atmosphere, means forming a water chamber within said cast connection and provided with an engine jacket opening and a water header opening, a longitudinally extending water header separate from and vertically displaced from said muiiier, and means for connecting said water header to said chamber through said water header opening.

6. A combined header and mufiier comprising, in combination, longitudinally extending inner and outer walls forming inner and outer passageways, an end closure plate for said outer passageway, a cast inlet connection having communication with said outer passage and secured to said outer wall to support the same, a discharge pipe connected to said inner passageway and extending through said oute wall to discharge to the atmosphere, means forming a water chamber within said cast connection and provided with an engine jacket opening and a water header open ing, a longitudinally extending water header overlying said cast connections, and vertically extending connecting passage means for supporting said water header by said cast connections and allowing communication with the water chamber therein through said water header open- WILLIAM L. H. DOYLE. 

